Full movie description "Diagnosis Murder A Candidate for Murder":

U.S. Senator Terrence Bell's daughter Melanie Bell collapses after being thrown out an electoral dinner where she threw a scene. Her boy-friend Ryan Breedlove rushes her to Mark's ER, it's just a drug dose. Melanie is taken away by the senator's men, including a private physician, and accidentally falls to her apparent death on a coffee-table while arguing with dad, who is up for reelection in mere months, blaming him for her ma's suicide. Political aid Peter Trent stops the Senator from calling the police and sees to it that the girl's corpse is found OD'd in Ryan's apartment. The sleuths soon find Melanie died from a blow, not drugs, and investigate everyone and everywhere...